Mathematics Measurement Procedural 10–11 yrs

Area of Triangles & Parallelograms

三角形与平行四边形的面积

Description

Calculate the area of parallelograms and triangles using formulae (A = b × h for parallelograms, A = ½ × b × h for triangles)

Mastery Evidence

✓ Calculate the area of a parallelogram with base 8 cm and height 5 cm
✓ Calculate the area of a triangle with base 12 cm and height 7 cm
✓ Explain why the area of a triangle is half the area of a related parallelogram

Assessment Prompt

If your child is cutting triangular pieces of cloth where the base is 8 cm and the height is 5 cm, can they use a formula to work out the area of each piece?