Area of triangles and quadrilaterals

Triangles, parallelograms, and trapezoids by composing and decomposing into rectangles.

Standards:6.G.A.1

Try it: three questions

Real questions from the practice bank. Tap an answer to check it.

Question 1 of 3

A rectangular flower bed is 9 m long and 5 m wide. A diagonal path cuts the bed into two triangles. What is the area of one triangle?

Question 2 of 3

A trapezoid has parallel sides of 5 cm and 9 cm, and a height of 6 cm. What is its area?

Question 3 of 3

A parallelogram has a base of 8 cm and a height of 5 cm. What is its area?

How this fits in

Area of triangles and quadrilaterals is one skill in the Basic Geometry unit. Students read the unit lesson, then earn a bronze, silver, or gold medal on their last 10 answers. Medals never go down. A mastered unit comes back for review after 1, 3, 7, 16, and 35 days so it stays learned.

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