Skills · Geometry · Angles & Lines
Angle pairs
Printable practice with an answer key the engine computes, at three levels, in as many versions as you need.
Problem types
- complementary angles (a right angle split in two): 37° and ? in a right angle
- a linear pair (a straight angle split in two): 65° and ? on a line
- vertical angles: 65° across from ?
- angles around a point: (4x + 10)°, (5x − 15)° and (6x − 10)° around a point
- an angle and its complement or supplement, in words: An angle measures 20° more than three times its complement.
Sample Sheet · Level 1
Find the measure of the angle marked ?.
Find the measure of the angle marked ?.
Find the measure of the angle marked ?.
Find the measure of the angle marked ?.
Find the measure of the angle marked ?.
Find the measure of the angle marked ?.
Find the measure of the angle marked ?.
Find the measure of the angle marked ?.
Answer key
- 26°
- 145°
- 112°
- 64°
- 147°
- 69°
- 49°
- 96°
Sample Sheet · Level 3
m∠1 = (3x + 34)° and m∠2 = (x + 46)°. Find m∠1.
m∠1 = (x + 35)° and m∠2 = (5x − 23)°. Find m∠2.
m∠1 = (2x + 42)°, m∠2 = (3x + 28)° and m∠3 = (4x + 20)°. Find m∠1.- An angle measures 40° less than four times its supplement. Find the angle.
m∠1 = (5x + 37)°, m∠2 = (4x + 35)° and m∠3 = (9x + 18)°. Find m∠1.
m∠1 = (x + 21)° and m∠2 = (2x − 18)°. Find m∠1.- An angle measures 10° more than four times its supplement. Find the angle.
m∠1 = (x + 35)° and m∠2 = (4x − 40)°. Find m∠1.
Answer key
- 109°
- 42°
- 102°
- 136°
- 112°
- 50°
- 146°
- 60°
Make your own
Pick the count, the level and the version, and print it with work space and the key on its own page. The same skill also makes an I Do, We Do, You Do lesson, a Mosaic, a Decoder and more.