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8-89.

Find the perimeter and area of each figure below.

  1. Triangle labeled as follows: top horizontal side, 15 km, left side, 7 km, right side, 10 km, 2 internal triangles are created by a line segment, labeled 4 km, drawn from the vertex, to the horizontal side, 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)