If a triangle has an angle of 45° and an angle of 100°, what is the third angle?
A. 55° B. 35° C. 100° D. 45°

Question

If a triangle has an angle of 45° and an angle of 100°, what is the third angle?
A. 55° B. 35° C. 100° D. 45°

calculusxy · Answer

A triangle equals to 180 degrees. We can write an equation and the solve for the missing variables. 

45+100+x=180

anonymous · Answer

180 is not a option

calculusxy · Answer

No I meant tht the total angle for a triangle is 180 degrees. That should help you find the misiing angle in the triangle.

anonymous · Answer

i agree 180 degrees but that what i am trying to find is the missing third angle finding it hard to come up with
Thank for your help i appreciate it

calculusxy · Answer

An easy way would be to solve for the equation that I provided above 
45+100+x=180
x is the misiing angle that we want to find. 

So add 45+100=145 then subtract 180-135=35

x=35. 

Answer is 35 degrees.

calculusxy · Answer

Sorry I meant 180-145=35 :)

anonymous · Answer

thank you i just couldn't figure it out ...

calculusxy · Answer

If you like my answer, you can give me a medal or be my fan :)