How many sides does a triangle have?
2
3
4
5
The two angles of a triangle measure 100° and 50°. What is the measure of its third angle?
50°
30°
180°
150°
At how many points do the intersecting lines meet?
0
1
At how many points do the parallel lines meet?
What angle do the two perpendicular lines form?
0°
45°
90°
How much does a right angle measure?
How much does a straight angle measure?
Can 100°, 50° and 30° be the measures of three angles of a triangle? Type yes or no.
Can 75°, 65° and 45° be the measures of three angles of a triangle? Type yes or no.
Can 6 cm, 4 cm and 5 cm be the measures of three sides of a triangle? Type yes or no.
Can 3 cm, 10 cm and 6 cm be the measures of three sides of a triangle? Type yes or no.
If two angles of a triangle measure 33° and 76°, type the measure of its third angle.
