please help me.....
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1.Semiperimeter=(AB+BC+CA)/2
=(8+6+10)/2
=12
2. let angle be 't'
x-10+t=90
t=100-x
3.True
4.True
5. given perimeter=60m
given that it is an equilateral triangle
a=b=c
then semiperimeter (s)=(a+b+c)/2
perimeter=a+b+c
60=3a
a=20m
b=20m
c=20m
s=30
Area of the triangle =
=
=√30.10.10.10
=100√3 cm²
hope this helps you
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