Three triangles
A square based pyramid has 4 triangular faces and 1 square face.
The number of triangles in a complete graph with n nodes is n*(n-1)*(n-2) / 6.
There are 15 triangles in a 17-agon
15 triangles
Three triangles
there are 4 triangles and 1 rectangle in an rectangular pyramid
27 triangles. There are 16 one-cell triangles, 7 four-cell triangles, 3 nine-cell triangles, and 1 sixteen-cell triangle.
1 rhombus 4-5 triangles
25
6
1
1
4 triangles make 1 hexagon. (easy way to find out how many triangles there are in a polygon- take number of sides of the polygon, subtract 2 from it, that's your answer!)
If there is a picture with 3 triangles and 1 upside down the the answer to that is OBVIOUSLY 5. Lol. The 4 triangles and the triangle going around the outside of the other little triangles inside of the picture.
1 triangle = 3 angles. 8 triangles = 8*3 = 24 angles!
1 triangle = 3 angles so 4 triangles = 4 x 3 = 12 angles unless some triangles are within others