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Home > CC1MN > Chapter 9 > Lesson 9.1.3 > Problem 9-32

9-32.

Find the perimeter and area of each triangle below.

The area of a triangle is equal to ()(base)(height).
The perimeter of a triangle is the sum of the lengths of all the sides.

  1. A triangle with a base of 14 cm, left side, 15 cm, and right side, 12 cm. Two internal triangles are created by a line segment, of 13 cm, drawn from the upper vertex, to the base, at right angles.

    The base of this triangle is cm and the height is
    cm.


    Can you find the perimeter?

  1. A triangle with a base of 25 inches, left side, 20 in, and right side, 15 inches. Two internal triangles are created by a line segment, of 12 in, drawn from the upper vertex, to the base, at right angles.

    If someone placed a string around the entire edge of
    this triangle, how long would the string have to be?


    Can you find the area?

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