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Home > CC1 > Chapter 6 > Lesson 6.2.2 > Problem 6-89

6-89.

Find the perimeter and area of each figure below.

  1. Area and perimeter diagram of a triangle: base is 15 km, left side is 7 km, and right side is 10 km.  Two internal triangles are created by a line segment, of 4 km, drawn from the upper vertex, to the base, at right angles.

  • Add all the side lengths together to find the perimeter.

  • Use the equation for finding the area of a triangle.

  1. A rectangle with length, seven eighths inches, and width, is three eighths inches.

  • Add all the side lengths together to find the perimeter.
    A rectangle has two pairs of sides with equal lengths.

  • Use the equation for finding the area of a rectangle.

  • Area = (base)(height)