Question

triangle a
□scalene □isosceles □equilateral
triangle b
□scalene □isosceles □equilateral
triangle c
□scalene □isosceles □equilateral

Explanation:

Step1: Classify Triangle A

Triangle A has two sides of length 6, and one side of length 10. A triangle with exactly two equal sides is isosceles.

Step2: Classify Triangle B

Triangle B has angles 30°, 60°, 90°. All angles are different, so all sides are different lengths. A triangle with no equal sides is scalene.

Step3: Classify Triangle C

Triangle C has all angles equal to 60°, which means all sides are equal in length. A triangle with all equal sides is equilateral.

Answer:

Triangle A: ☐Isosceles (checked)
Triangle B: ☐Scalene (checked)
Triangle C: ☐Equilateral (checked)