Area of Triangles & Quadrilaterals Lesson

Area of Triangles & Quadrilaterals

Area of a rectangle is base x height or length x width

3 x 2 = 6 sq. cm

Multiple Choice

Find the area.

• 13

• 36

• 94

• 18

Multiple Choice

What is the area of a square with a side length of 5 inches?

• 10 square inches

• 25 square inches

• 20 square inches

​These are parallelograms:

2 pair of parallel lines.

​These arrows mean the lines are parallel.

​These dashes mean the lines

are the same length.​

​The area for a parallelogram is

base x height​

Multiple Choice

Find the area.

• 10 square inches

• 64 square inches

• 24 square inches

Triangles

1/2 b x h

​We don't need one of these measurements. Which one?

​The height of a shape is ALWAYS perpendicular to its base.

​base

​height

​This triangle and this rectangle have the same base & height. That is why you must divide by 2 for the area of a triangle.

Multiple Choice

Find the area in square inches

• 84

• 42

• 105

Multiple Choice

Find the area

• 21.5

• 28.81

• 33.5

Multiple Choice

Find the area.

1/2 base x height

Be careful. You don't need one of these measurements.

• 88

• 32

• 16

Multiple Choice

A rectangle has a length of 4 mm and a height of 9 mm. Find its area in square mm.

• 49

• 13

• 36

Multiple Choice

Find the area in square m.

• 5

• 4.5

• 3.6

Multiple Choice

Area of triangle?

• 20 cm²

• 56 cm²

• 28 cm²

• 27 cm²

Multiple Choice

Calculate the area of the figure.

• 257.4 m²

• 128.7 m²

• 514.8 m²

• 245.7 m²

• 134.6 m²

Multiple Choice

What is the area of the parallelogram?

(remember the height is perpendicular to the base)

• 15.6 cm²

• 30.6 cm²

• 13.26 cm²

• 79.56 cm²

Multiple Choice

Area of triangle?

• 17 units²

• 20 units²

• 10 units²

• 16 units²

Poll

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