Final answer:
For a scale drawing of an isosceles triangle, the only property from the given options that would necessarily hold true is having two equal angles, a reflection of the definition of an isosceles triangle itself. The selection of three equal sides, one obtuse angle, or one acute angle would depend on the specific triangle and cannot be determined without additional information.
Step-by-step explanation:
The question pertaining to select all descriptions that define a scale drawing of an isosceles triangle can be approached by understanding the properties of an isosceles triangle and scale drawings. An isosceles triangle, by definition, has two equal sides and consequently two equal angles opposite those sides. Therefore, the correct descriptions for a scale drawing of this triangle are:
- Two equal angles, since this is intrinsic to the definition of an isosceles triangle.
- Three equal sides is incorrect as an isosceles triangle has exactly two equal sides, not three.
- One obtuse angle or one acute angle would depend on the specific measurements of the angles in the triangle. Since we don't have those measurements, we cannot ascertain whether there is an obtuse or acute angle in this case.
A scale drawing preserves the properties of the shape being drawn, meaning the same rules apply to scale drawings as to the shapes they represent. In summary, for a scaled drawing of an isosceles triangle, only the property of having two equal angles would necessarily be true.