Core Connections Integrated II, 2015
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Core Connections Integrated II, 2015 View details
2. Section 7.2
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Exercise 110 Page 415

The triangle is an isosceles triangle.

B

Practice makes perfect
Examining the diagram we see that the given triangle is isosceles, which means it has two congruent sides. By the Base Angles Theorem we know that the angles opposite the congruent sides are congruent.

Therefore, we should equate the angle measures. 4x+2^(∘) = 9x-3^(∘) This means B is correct.