3. Find the area of a triangle two sides of which are 18 cm and 10'cm and the
perimeter" is 42 cm.
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2
Answer:
answer is 126cm2
Step-by-step explanation:
hope it helps...
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Answered by
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Step-by-step explanation:
third side=42-(18+10)
= 42-28
= 14
area of triangle=
√s×(s-a)(s-b)(s-c)
s= a+b+c÷2
=18+10+14÷2
=42÷2
=21
√21×3×11×7
=1058.57
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