Question

Select all statements that are true about triangles:

A) All triangles have three sides
B) Equilateral triangles have equal angles
C) Right-angled triangles have one angle measuring 90 degrees
D) Isosceles triangles have all sides equal

Answer 1

All triangles have three sides, equilateral triangles have equal angles, right-angled triangles have one angle measuring 90 degrees, and isosceles triangles have all sides equal.

Step-by-step explanation:

A) All triangles have three sides

B) Equilateral triangles have equal angles

C) Right-angled triangles have one angle measuring 90 degrees

D) Isosceles triangles have all sides equal

All of the statements A, B, C, and D are true about triangles:

1. All triangles have three sides. This is a fundamental characteristic of a triangle.
2. Equilateral triangles have equal angles. In an equilateral triangle, all three angles are equal and each angle measures 60 degrees.
3. Right-angled triangles have one angle measuring 90 degrees. In a right-angled triangle, one of the angles is a right angle, which measures 90 degrees.
4. Isosceles triangles have all sides equal. In an isosceles triangle, two sides are equal in length.