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Sliva [168]
2 years ago
13

Find the value of Z. A)7 B)9 C)11 D)12

Mathematics
2 answers:
Gala2k [10]2 years ago
4 0
As per the isosceles triangle theorem, if the two base angles are congruent then the legs are also congruent, so we must set the two legs equal to each other:

2z - 15 = 9

Add 15 to both sides:

15 - 15 = 0
15 + 9 = 24

Divide 2 from each side:

2z = 24

2z/2 = z

24/2 = 12

z = 12

Hence, the answer would be D: z = 12

arlik [135]2 years ago
4 0

2z-15=9\\2z=24\\z=12

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