Page 243 - ABCTE Study Guide_Neat
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Answer
Choice B is correct. Since the triangle is isosceles, it has two legs that measure 4 inches each, and a
base that measures 7 inches. Therefore, the perimeter is 4 in. + 4 in. + 7 in., or 15 in. Choice A is
incorrect, because the segment labeled 3.5 in. is not a side of triangle ABC.
Triangles: Area
The area of a two-dimensional figure is the number of square units it contains. You’ve probably heard of
2
an apartment or house being measured in square feet (ft ). Other examples of square units are square
2
2
inches (in ) and square centimeters (cm ).
The area of a triangle is given by the formula , where b is the base and h is the height.
It is important to remember that the base and the height must be perpendicular.
Question
What is the area of triangle ABC below?
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A 7 in
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B 13.125 in
