Question

What number of triangles can be found using the set of interior measure 12,90,78

One unquie triangle
Many triangles
No triangles

Answer 1

To determine whether a triangle can be formed with the given interior measures of 12°, 90°, and 78°, we need to check if these angles can form a valid triangle.

The key principle to remember is that the sum of the interior angles in a triangle must equal 180°.

Let's add the given angles together:

\[
12° + 90° + 78° = 180°
\]

Since the sum of the angles equals 180°, the angles can indeed form a triangle.

Now to classify the triangle:
- One triangle (since the angles are fixed and cannot be rearranged to form another unique triangle).

Thus, the answer is: **One unique triangle**.