Skills · Geometry · Circles
Inscribed angles
Printable practice with an answer key the engine computes, at three levels, in as many versions as you need.
Problem types
- an inscribed angle (half its arc): m⌒AC = 100°, m∠ABC = ?
- an intercepted arc (twice its angle): m∠ABC = 50°, m⌒AC = ?
- an angle inscribed in a semicircle (90°): AC a diameter, m∠BAC = 35°, m∠BCA = ?
- an inscribed quadrilateral (opposite angles add to 180°): m∠A = (3x + 10)°, m∠C = (5x + 10)°
Sample Sheet · Level 1
Find the measure marked ?.
Find the measure marked ?.
Find the measure marked ?.
AC is a diameter. Find the measure marked ?.
AC is a diameter. Find the measure marked ?.
AC is a diameter. Find the measure marked ?.
Find the measure marked ?.
Find the measure marked ?.
Answer key
- 120°
- 100°
- 28°
- 30°
- 53°
- 55°
- 156°
- 60°
Sample Sheet · Level 3
AC is a diameter. Find m∠BAC.
Find m⌒AC.
Find m∠ABC.
ABCD is inscribed in the circle. Find m∠B.
Find m⌒AC.
ABCD is inscribed in the circle. Find m∠A.
AC is a diameter. Find m∠BAC.
Find m∠ABC.
Answer key
- 39°
- 44°
- 31°
- 72°
- 144°
- 76°
- 57°
- 55°
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.