Area of Triangles, Quadrilaterals, and Polygons

Which of the following shapes is a quadrilateral?

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Polygons with four sides are called _________.

Polygons with three sides are called ________.

In the diagram shown, each oval represents a classification of two-dimensional figures. If a classification belongs in an oval, it also belongs in any larger oval.

Which label belongs in the shaded oval

• Circles

• Quadrilaterals

• Triangles

• Pentagons

What formula is used to find the area of the figure?

Which formula would you use to find the area of a triangle?

What is the area formula of a triangle?

• bh

• 1/2 bh

• lw

• 1/2h(b₁+b₂)

What formula would you use to find the area?

• A = bh

• A = 1/2 bh

• A = 1/2 h (b₁+b₂)

• A = lw

Compose this triangle into a parallelogram and find the area of the shaded polygon.

• 143 cm²

• 286 cm²

• 169 cm²

• 484 cm²

Find the area of this polygon.

• 88 inches²

• 60 inches

• 88 inches

• 60 inches²