Answer:
D
Step-by-step explanation:
hope it helps :)
have a nice day or night
No, it never can be a right triangle.
First, all the angles of an equilateral triangle is 60 degrees because all angles are the same and all the angles add up to 180:
180/3 = 60.
So if it is a right angle it needs one angle 90 degrees which an equilateral triangle can't have,
we are given two points as
(3, 16) and (5, 10)
firstly , we will find slope
slope is m
so, we can use formula

now, we can plug points



we can plug it in y=mx+b
we get

now, we can select any one points
and find b
(3,16)
x=3 and y=16

we can find b

now, we can plug back b
and we get

so, equation is

and
...............Answer
He can either measure the third side length, apply the Pythagorean theorem to find the height of the triangle, and then calculate the area, or he can find the measure of the included angle between the known side lengths and use trigonometry to express the height of the triangle and then determine the
area of the triangle