Marco is writing a coordinate proof for one of the properties of an isosceles triangle. he begins by assigning coordinates to two of the vertices of an isosceles triangle as shown.

what coordinates should he assign to the third vertex of the isosceles triangle?

(a, b)(a, b)

(b, a)(b, a)

(b, b)(b, b)

(2a, 2b)

If the base of the isosceles triangle lies on the x axis and one of the base angles is located on the origin, then the third vertex would lie somewhere in Quadrant I. If the coordinate of the second base angle is (2a, 0), then the coordinates that should be assigned to the third vertex of the isosceles triangle is (a, b).

Just took the test and I got the answer correct. :)))

Step-by-step explanation:

Look at the answer in the picture below!!

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)