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GrogVix [38]
3 years ago
8

Please help ! (FINALS)

Mathematics
1 answer:
anygoal [31]3 years ago
8 0

Answer:

Rachel is correct

Step-by-step explanation:

We can calculate angle T by using cosine rule where;

t² = r² + m² - 2rm cos T

From the diagram, we see that;

t = 30

r = 18

m = 24

Thus;

30² = 18² + 24² - 2(18 × 24)cosT

900 = 324 + 576 - 864cosT

864cosT = 900 - 324 - 576

864cosT = 0

cosT = 0/864

T = cos^(-1) 0

T = 90°

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