Chapter 8 Polygons and Area

Section 4 Area of Triangles

Example 1: Find the Area of a Right Triangle Find the area of the right triangle.

Example 2: Find the Area of a Triangle Find the area of the triangle.

Example 3: Find the Height of a Triangle Find the height of the triangle, given that the area is 39 square inches.

Checkpoint: Area of Triangles For 1-3, find the area of the triangle Checkpoint: Area of Triangles For 1-3, find the area of the triangle. 4) A triangle has an area of 84 square inches and a height of 14 inches. Find the base.

Example 4: Areas of Similar Triangles Find the ratios of the areas of the similar triangles. Find the scale factor of ∆ABC to ∆DEF and compare it to the ratio of their areas.

EXIT SLIP