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Sagot :
Answer:
67
Step-by-step explanation:
Use the triangle angle sum theorem. All interior angles of a triangle sum to 180 degrees. Angle b = 23, angle c = 90 (notice the marking in the triangle), angle a is what we need to find. Set the sum of all three of these equal to 180 to solve for angle a.
23+90+angle a= 180. Combine like terms
113 + angle a = 180. Subtract 113 from both sides.
Angle a = 67
Answer:
67⁰
Step-by-step explanation:
According to the Triangle Sum Theorem, all three angles sum up to 180⁰.
<A + <B + <C = 180⁰
You are given the two angles. To find the third or the missing angle you will use the triangle sum thereom.
<A + <B + <C = 180⁰
90⁰ + 23⁰ + <C = 180⁰
113⁰ + <C = 180⁰
113⁰ - 113⁰ + <C = 180⁰ - 113⁰
<C = 67⁰
Hope this helps, thank you :) !!
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