# Chapter 3 - Section 3.2 - Corresponding Parts of Congruent Triangles - Exercises: 22

b=3.87

#### Work Step by Step

Given that triangle is right angle triangle where a=7 and c=8 and b has to be found formula for finding hypoteneus of right andle triangle is $a^{2}$+$b^{2}$=$c^{2}$ so after putting values of a and b, $7^{2}$+$b^{2}$=$8^{2}$ 49+$b^{2}$=64 $b^{2}$=15 b=$\sqrt 15$=3.87

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