Answer:
Area = 42.43 square cm
Step-by-step explanation:
Using Heron's Formula :

<em><u>Find Area :</u></em>
<em><u></u></em>




Answer: It is an obtuse triangle I think beause more than one side is more than a 90 degree angle
Step-by-step explanation:
Answer:
4.19
Step-by-step explanation:
just use the formula 2pir^2
Answer:
-1.15
Step-by-step explanation:
Subtract 0.4 from −
0.75
.
Yea his answer is right ^^