Answer:
A) but it is not a good choice.
Step-by-step explanation:
I don't like A much. An Isosceles triangle has 2 congruent sides. If all three are congruent, it is equilateral.
Of the three choices however, it is A. B is a scalene triangle and C is as stated, equilateral.
The area of a trapezoid is calculated using the formula: 1/2(a + b)h. The diagram shows that base number one (a) is 8.5 dm and base number two (b) is 26.5 dm. The height is 9 dm. Substitute these values into the formula.
1/2(8.5 + 26.5) * 9, add 8.5 and 26.5 inside the parentheses.
1/2(35) * 9, you can now solve from left to right. Multiply 1/2 and 35.
17.5 * 9, multiply to get your final answer. The area of the trapezoid is C. 157.5 dm^2.
Fractions can be added and subtracted but only if they are like fractions or have a common denominator
