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Answer:
(-5, 3)
Step-by-step explanation:
The perimeter should be 144.7 units
The answer is 3 because 3.75 divided by 2.5 is 1.5 , and when finding the area of a triangle you have to cut one of the sides values in half then multiply it by the other side. So 2.5 times 3 equals 7.5 and then divided by 2 is 3.75.
Answer:
Total area = 29.8 sq. units
Step-by-step explanation:
<u>area of each triangle = sqrt(s * (s-a) * (s-b) * (s-c))</u>
to get the value of s, use the <u>semi-perimeter = s = perimeter / 2</u>
<u>Total area = area of triangle ABD + area of triangle ACD</u>
semi-perimeter of ABD = (3.48 + 8.66 + 8.6) / 2 = 10.37
semi-perimeter of ABD = (3.54 + 8.84 + 8.6) / 2 = 10.49
area of triangle ABD = sqrt(10.37 * (10.37-3.48) * (10.37-8.66) * (10.37-8.6))
area of triangle ABD = 14.7 sq. units
area of triangle ACD = sqrt(10.49 * (10.49-3.54) * (10.49-8.84) * (10.49-8.6))
area of triangle ACD = 15.08
Total area = 14.7 + 15.1
Total area = 29.8 sq. units
