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A Tale of Three Intersecting Lines Practice 1: Angle Sum and Exterior Angle and Triangle Basics

Concept Check

Question 1mcq
A triangle has side lengths 5 cm, 5 cm and 8 cm. How is it classified by sides?
A.isosceles
B.equilateral
C.scalene
D.right-angled
Question 2mcq
A triangle has side lengths 6 cm, 6 cm and 8 cm. How is it classified by sides?
A.equilateral
B.isosceles
C.scalene
D.right-angled
Question 3mcq
A triangle has side lengths 7 cm, 7 cm and 8 cm. How is it classified by sides?
A.equilateral
B.scalene
C.isosceles
D.right-angled
Question 4mcq
A triangle has side lengths 5 cm, 5 cm and 9 cm. How is it classified by sides?
A.equilateral
B.scalene
C.isosceles
D.right-angled
Question 5mcq
A triangle has side lengths 6 cm, 6 cm and 9 cm. How is it classified by sides?
A.equilateral
B.scalene
C.right-angled
D.isosceles
Question 6mcq
A triangle has side lengths 7 cm, 7 cm and 9 cm. How is it classified by sides?
A.isosceles
B.equilateral
C.scalene
D.right-angled

Apply and Solve

Question 7mcq
A triangle has side lengths 5 cm, 5 cm and 7 cm. How is it classified by sides?
A.isosceles
B.equilateral
C.scalene
D.right-angled
Question 8mcq
A triangle has side lengths 6 cm, 6 cm and 7 cm. How is it classified by sides?
A.equilateral
B.isosceles
C.scalene
D.right-angled
Question 9mcq
A triangle has side lengths 7 cm, 7 cm and 7 cm. How is it classified by sides?
A.equilateral
B.scalene
C.isosceles
D.right-angled
Question 10mcq
Two angles of a triangle are 44∘44^\circ and 50∘50^\circ. What is the third angle?
A.94∘94^\circ
B.104∘104^\circ
C.86∘86^\circ
D.4∘4^\circ
Question 11mcq
Two angles of a triangle are 44∘44^\circ and 55∘55^\circ. What is the third angle?
A.99∘99^\circ
B.109∘109^\circ
C.9∘9^\circ
D.81∘81^\circ
Question 12mcq
Two angles of a triangle are 44∘44^\circ and 60∘60^\circ. What is the third angle?
A.76∘76^\circ
B.104∘104^\circ
C.114∘114^\circ
D.14∘14^\circ