1. The 3 angles in a triangle always add up to 180° If you know 2 of the angles, you can calculate the third angle. Click to find out how…. 72° 63° 63° so 180° +72° - 135° 135° 45° 45°

2. The army needs to test how steep their tanks can climb. Calculate the third angle of these examples, so that the practice ramps can be built. Write the answers, and any calculations, in your jotters. 1 90° 38° ?

3. The army needs to test how steep their tanks can climb. Calculate the third angle of these examples, so that the practice ramps can be built. Write the answers, and any calculations, in your jotters. 2 53°70° ?

4. The army needs to test how steep their tanks can climb. Calculate the third angle of these examples, so that the practice ramps can be built. Write the answers, and any calculations, in your jotters. 3 94° 30°?

5. The army needs to test how steep their tanks can climb. Calculate the third angle of these examples, so that the practice ramps can be built. Write the answers, and any calculations, in your jotters. 4 90° 65° 63° ?

6. The army needs to test how steep their tanks can climb. Calculate the third angle of these examples, so that the practice ramps can be built. Write the answers, and any calculations, in your jotters. 5 50° 104° ?

7. The End Now click on the link on the website, to try the Angles Challenge!