Answer:
-13-14-15
Step-by-step explanation:
This is true. An isosceles triangle is one that has two equal sides and two equal angles. The third side can be any length and the third angle will also vary depending on the other two angles. An equilateral triangle is one where all sides and angles are equal. An isosceles can be equilateral, but it does not have to be.
The first one is correct, just match the numbers with the corresponding sides of each triangle
- Key -
Black tiles = x
Purple tiles = x+50
Yellow tiles = 5x
-
Total = x + x+50 + 5x = 400
⇒ 7x + 50 = 400
⇒ 7x = 400-50 = 350
⇒ x = 350/7
⇒ x = 50
Black tiles = 50
Purple tiles = 50+50 = 100
Yellow tiles = 5 x 50 = 250
