Area of Triangles & Parallelograms

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

Usually learned at ages 10–11

Builds on: Multiplying fractions (age 10+) (helps), Estimating answers (age 9+), Using Simple Formulae (helps), Classifying shapes by properties (helps)

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On the map from: Marble Skill Taxonomy (v1), © Generative Spark, Inc. (withmarble.com), text CC BY-SA 4.0, database ODbL 1.0: https://github.com/withmarbleapp/os-taxonomy