Question

1. marla draws a diagonal in a rhombus to form two triangles. what term can she use to classify each triangle? explain. (1 point) acute; a rhombus always has 2 acute angles so the 3 angles in each triangle must all be acute. equilateral; since a rhombus always has 4 equal sides, each triangle must have 3 equal sides. isosceles; since a rhombus always has 4 equal sides, each triangle must have 2 equal sides. obtuse; a rhombus always has 2 obtuse angles so each triangle must have an obtuse angle.

Explanation:

A rhombus has four equal - length sides. When a diagonal is drawn in a rhombus to form two triangles, each triangle has two sides that are equal (because the sides of the rhombus are equal). An isosceles triangle is defined as a triangle with at least two equal sides.
The first option is incorrect because a rhombus has two acute and two obtuse angles (in a non - square rhombus), so the triangles formed are not necessarily all - acute. The second option is incorrect because a rhombus does not have all angles equal (so the triangles formed are not equilateral). The fourth option is incorrect because when a diagonal is drawn, the triangles formed do not always have an obtuse angle (for example, in a square - which is a special rhombus - the triangles formed by a diagonal are right - isosceles triangles).

Answer:

Isosceles; since a rhombus always has 4 equal sides, each triangle must have 2 equal sides.