3 years ago

PLZZZ ANSWER!! Answers for points will be reported.

Mathematics

1 answer:

Lisa [10]3 years ago

7 0

Answer:

272.6

Step-by-step explanation:

This is an isosceles triangle with base of 21 and sides of 28.

<u>Area formula</u>

A = 1/2bh

<u>Find height:</u>

h = $\sqrt{28^2 - (21/2)^2} = \sqrt{673.75} = 25.96$

A = 1/2(25.96)(21) = 272.6 (rounded)

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