Mensuration and calculation common mistakes

Measures in geometry common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Use standard units of measure and related concepts including length, area, volume, capacity, mass, time and money..

Show the method first, then give the final answer in the required form. Apply this directly to Measures in geometry.

Angles, maps, scale drawings and bearings common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Measure line segments and angles in geometric figures..

Show the method first, then give the final answer in the required form. Apply this directly to Angles, maps, scale drawings and bearings.

Angles, maps, scale drawings and bearings common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Interpret maps, scale drawings and bearings, including compass bearings and three-figure bearings..

Show the method first, then give the final answer in the required form. Apply this directly to Angles, maps, scale drawings and bearings.

Area and volume formulae common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Know and apply formulae for areas of triangles, parallelograms and trapezia..

Show the method first, then give the final answer in the required form. Apply this directly to Area and volume formulae.

Area and volume formulae common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Know and apply formulae for volumes of cuboids and other right prisms, including cylinders..

Show the method first, then give the final answer in the required form. Apply this directly to Area and volume formulae.

Circles and composite solids common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Know and use the formulae for circumference and area of a circle..

Show the method first, then give the final answer in the required form. Apply this directly to Circles and composite solids.

Circles and composite solids common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Calculate perimeters of two-dimensional shapes, including circles, and areas of circles and composite shapes..

Show the method first, then give the final answer in the required form. Apply this directly to Circles and composite solids.

Circles and composite solids common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Calculate surface area and volume of spheres, pyramids, cones and composite solids, including frustums where required..

Show the method first, then give the final answer in the required form. Apply this directly to Circles and composite solids.

Sectors and arcs common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Calculate arc lengths, angles and areas of sectors of circles..

Show the method first, then give the final answer in the required form. Apply this directly to Sectors and arcs.

Congruence and similarity calculations common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Apply congruence and similarity, including relationships between lengths in similar figures..

Show the method first, then give the final answer in the required form. Apply this directly to Congruence and similarity calculations.

Congruence and similarity calculations common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Include relationships between lengths, areas and volumes in similar figures..

Show the method first, then give the final answer in the required form. Apply this directly to Congruence and similarity calculations.

Pythagoras and trigonometric ratios common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Know and apply Pythagoras' theorem and the trigonometric ratios to find angles and lengths in right-angled triangles in two-dimensional figures..

Show the method first, then give the final answer in the required form. Apply this directly to Pythagoras and trigonometric ratios. For Pythagoras, confirm the triangle is right-angled and identify the hypotenuse.

Pythagoras and trigonometric ratios common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Apply Pythagoras and trigonometric ratios to right-angled and general triangles in two and three dimensions where possible..

Show the method first, then give the final answer in the required form. Apply this directly to Pythagoras and trigonometric ratios. For Pythagoras, confirm the triangle is right-angled and identify the hypotenuse.

Exact trigonometric values common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Know exact values of sin and cos for 0, 30, 45, 60 and 90 degrees..

Show the method first, then give the final answer in the required form. Apply this directly to Exact trigonometric values.

Exact trigonometric values common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Know exact values of tan for 0, 30, 45 and 60 degrees..

Show the method first, then give the final answer in the required form. Apply this directly to Exact trigonometric values.

Sine and cosine rules common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Know and apply the sine rule and cosine rule to find unknown lengths and angles..

Show the method first, then give the final answer in the required form. Apply this directly to Sine and cosine rules.

Area of any triangle common mistake 1

Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Know and apply Area = 1/2 ab sin C to calculate the area, sides or angles of any triangle..

Show the method first, then give the final answer in the required form. Apply this directly to Area of any triangle.