This math topic focuses on using algebraic equations to find missing angles in triangles, specifically within the context of isosceles and equilateral triangles. Students are prompted to select the correct equation that sums up to 180 degrees, reflecting the property that the sum of angles in a triangle is always 180 degrees. The problems consist of various configurations of given angles, challenging students to apply the triangle angle sum rule effectively.
Work on practice problems directly here, or download the printable pdf worksheet to practice offline.
Practice:
Equation to Find the Missing Angle on the Triangle
Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.
Find the equation that will help you calculate the missing angle of the triangle
Equation to Find the Missing Angle on the Triangle Worksheet
| Math worksheet on 'Equation to Find the 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 equation that will help you calculate the missing angle of the triangle |
a
| 40 + 50 + ? = 360 |
b
| 40 - 50 - ? = 360 |
c
| 40 + 50 + ? = 90 |
d
| 2(40 + 50 + ?) = 180 |
e
| 40 + 50 + ? = 180 |
2
| Find the equation that will help you calculate the missing angle of the triangle |
a
| 2(30 + 70 + ?) = 180 |
b
| 30 - 70 - ? = 360 |
c
| 30 + 70 + ? = 360 |
d
| 30 + 70 + ? = 180 |
e
| 30 + 70 + ? = 90 |
3
| Find the equation that will help you calculate the missing angle of the triangle |
a
| 70 + 50 + ? = 360 |
b
| 70 + 50 + ? = 180 |
c
| 70 + 50 + ? = 90 |
d
| 70 - 50 - ? = 360 |
e
| 2(70 + 50 + ?) = 180 |
4
| Find the equation that will help you calculate the missing angle of the triangle |
a
| 2(40 + 40 + ?) = 180 |
b
| 40 + 40 + ? = 90 |
c
| 40 - 40 - ? = 360 |
d
| 40 + 40 + ? = 360 |
e
| 40 + 40 + ? = 180 |
5
| Find the equation that will help you calculate the missing angle of the triangle |
a
| 2(50 + 60 + ?) = 180 |
b
| 50 + 60 + ? = 360 |
c
| 50 + 60 + ? = 180 |
d
| 50 - 60 - ? = 360 |
e
| 50 + 60 + ? = 90 |
6
| Find the equation that will help you calculate the missing angle of the triangle |
a
| 40 + 60 + ? = 360 |
b
| 40 - 60 - ? = 360 |
c
| 40 + 60 + ? = 180 |
d
| 2(40 + 60 + ?) = 180 |
e
| 40 + 60 + ? = 90 |
7
| Find the equation that will help you calculate the missing angle of the triangle |
a
| 2(70 + 40 + ?) = 180 |
b
| 70 + 40 + ? = 180 |
c
| 70 + 40 + ? = 360 |
d
| 70 - 40 - ? = 360 |
e
| 70 + 40 + ? = 90 |