How to Find the Missing Angle in a Triangle

All 3 angles in any triangle will...

• be right angles

• be flexible

• add up to 180⁰

Tags

CCSS.8.G.A.5

How many degrees are in a straight angle?

• 90⁰

• 180⁰

• 360⁰

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

All of the angles of a triangle will add up to ....

• 180⁰

• an acute angle

• trouble

Tags

CCSS.8.G.A.5

how can we figure out what the 3rd angle is????

• add the 2 angles up and subtract that number from 180⁰

• google it?

   

  say NO!

• Add the 2 angles up and multiply that number by 180⁰

Tags

CCSS.8.G.A.5

How can you check your answer?

• Add all of the angles and see if they add up to 180⁰

• Subtract from 180⁰