Question

If two triangles have equal perimeters, then they could also have which of the following? Select all that apply.

equal volumes
equal areas
equal bases
equal heights

Answer 1

i think its equal areas, bases, and heights

Explanation:

Answer 2

Answer: The answers is (B) equal areas.

Step-by-step explanation: Given that two triangles have equal perimeters.

As shown in the attached figure, let us consider two right-angles triangles, ΔABC and ΔDEF, with sides AB = 3 cm, BC = 4 cm, AC = 5 cm, DE = 4 cm, EF = 3 cm and DF = 5 cm.

So the perimeters of both the triangles = 3 + 4 + 5 = 4 + 3 + 5 = 12 cm.

Since volume term is not valid in case of triangles, so they cannot have equal volumes. Therefore, option (A) is incorrect.

Area of ΔABC is

`A_(ABC)=(1)/(2)* AB * BC = (1)/(2)* 3* 4=6~\textup{cm}^2,`

and area of ΔDEF is

Therefore, they may have equal areas and so option (B) is correct.

If the triangles have equal bases, then the heights will also be equal and both the triangles will be same. Similar is the case with equal heights. So, options (C) and (D) are incorrect.

Thus, the correct option is (B). equal areas.