Finding Missing Angles in Triangles

Find the measure of the missing angle.

• 90^o

• 10⁰

• 130^o

• 50^o

Solve for x.

• 16

• 11

• 50

• 6

If two of the angles of a triangle are 30 and 70 degrees, the third angle measures...

• 80

• 100

• 60

• 90

What is the third angle of a triangle whose 1st angle is 34 and 2nd angle is 101?

• 32

• 39

• 45

• 54

Mathematical Equivalence

OFF

Find all missing angles.

m∠1 ​ (a)   m∠2 ​ (b)  

m∠3​ (c)   m∠4 ​ (d)  

• 51

• 18

• 123

• 39

• 22

• 130

• 98

• 44

• 35

Find the measure of each missing angle.

m<1 ​ (a)   m<2 ​ (b)   m<3 ​ (c)   m<4 ​ ​ (d)  

• 36

• 56

• 124

• 88

• 46

• 55

• 94

• 25

• 136

Find the measure of the indicated angle. Type only the number for your answer.

Mathematical Equivalence

ON

Find the measure of each missing angle.

m<1 ​ (a)   m<2 ​ (b)   m<3 ​ (c)   m<4 ​ (d)  

• 35

• 145

• 55

• 125

• 120

• 40

• 36

• 132

• 64

Find the measure of the missing angle.

• 47

• 57

• 53

• 133