triangle ABC is a right angled triangle at B. find 'a' if b=15cm and c=9cm
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When we represent a triangle with capital letters and the lengths are represented with small letters, then these small letters are assumed opposite to the capital letters.
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Answer:
12 cm
Step-by-step explanation:
b²= a² + c²
(15)²= a² +(9)²
225= a² + 81
225 - 81 = a²
144 = a²
a²= 144
a = √144
a = 12 cm
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