Question

problem 5: (first taught in lesson 29) complete this sentence with the best of the choices given. a(n) __________ triangle has three congruent (equal) sides. after you pick your answer press go. a. isosceles b. equilateral c. acute d. scalene e. right

Explanation:

Step1: Recall triangle - type definitions

An isosceles triangle has two equal sides.

Step2: Analyze equilateral triangle

An equilateral triangle has three equal sides.

Step3: Consider acute triangle

An acute - angled triangle has all angles less than 90 degrees, not related to side - length equality.

Step4: Look at scalene triangle

A scalene triangle has no equal sides.

Step5: Examine right - angled triangle

A right - angled triangle has one 90 - degree angle, not related to side - length equality.

Answer:

B. equilateral