This math topic focuses on finding missing angles in triangles, specifically within the context of geometry that involves isosceles and equilateral triangles. Each problem requires the application of the principle that the sum of the interior angles in a triangle is always 180 degrees. The problems are structured to help learners practice their ability to calculate unknown angles using this rule, enhancing their comprehension of triangle geometry and angle relationships.
Work on practice problems directly here, or download the printable pdf worksheet to practice offline.
moreMissing Angle on the Triangle Worksheet
| Math worksheet on 'Missing Angle on the Triangle (Level 1)'. Part of a broader unit on 'Geometry - Isosceles and Equilateral Triangles' Learn online: app.mobius.academy/math/units/geometry_triangles_isosceles_equilateral_intro/ |
1
| Find the missing angle of the triangle given that the interior angles must add up to 180° |
a
| 90 |
b
| 60 |
c
| 70 |
d
| 100 |
e
| 110 |
f
| 80 |
2
| Find the missing angle of the triangle given that the interior angles must add up to 180° |
a
| 70 |
b
| 40 |
c
| 60 |
d
| 90 |
e
| 50 |
3
| Find the missing angle of the triangle given that the interior angles must add up to 180° |
a
| 120 |
b
| 130 |
c
| 110 |
d
| 140 |
e
| 100 |
f
| 90 |
4
| Find the missing angle of the triangle given that the interior angles must add up to 180° |
a
| 90 |
b
| 70 |
c
| 100 |
d
| 60 |
e
| 40 |
f
| 50 |
5
| Find the missing angle of the triangle given that the interior angles must add up to 180° |
a
| 70 |
b
| 50 |
c
| 40 |
d
| 60 |
e
| 90 |
f
| 80 |
6
| Find the missing angle of the triangle given that the interior angles must add up to 180° |
a
| 90 |
b
| 20 |
c
| 30 |
d
| 40 |
e
| 70 |
f
| 50 |
7
| Find the missing angle of the triangle given that the interior angles must add up to 180° |
a
| 90 |
b
| 30 |
c
| 60 |
d
| 70 |
e
| 80 |
f
| 50 |