Area of Triangles & Parallelograms

MathematicsMeasurementAges 10–11

Area of Triangles & Parallelograms

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

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Learning resources

Reviewed external links that reinforce this concept. They do not replace Gakuva’s teaching approach.

No reviewed resources for this concept yet.

The teaching approach above still stands. Curated practice links will appear here as the shelf fills.

Explore the learning path

4 before · 1 after

Before

Estimating answers (age 9+)Required first Using Simple Formulae Multiplying fractions (age 10+)Classifying shapes by properties

This concept

Area of Triangles & ParallelogramsProcedural concept

Angles in triangles (age 11+)

Check understanding

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

“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?”

Curriculum record

Type: Procedural
Subject: Mathematics
Domain: Measurement
Age range: Ages 10–11