Your question seem to me non-understandable. Are they adding up together ?
or multiplying ?
I'm pretty sure both B and C equal 12 as well
Since the triangle equals 180 and the angels are all congruent
Answer:
Area = 16.8 * 7 / 2 = 58.8 ft2
Step-by-step explanation:
Have
18.2^2 = 7^2 + a^2
-> a^2 = 18.2^2 - 7^2
-> a^2 = 282.24
-> a = 16.8
Area = 16.8 * 7 / 2 = 58.8 ft2