Find the angles of an isosceles triangle if the degree measures of two of them are 2: 5.

In such a triangle, 2 angles are equal.

Option number 1.

Let each of the equal angles be greater than the third.

Then we get the following ratio of all angles 5: 5: 2.

Let’s determine what the angles of our triangle will be equal to:

180: (2 + 5 + 5) = 15;

15 * 2 = 30;

15 * 5 = 75.

Answer: Two at 75 °, one at 30 °.

Option number 2.

Let each of the equal angles be less than the third.

Then we get 2: 2: 5

Let’s determine what the angles of our triangle will be equal to:

180: (2 + 2 + 5) = 20;

20 * 2 = 40;

20 * 5 = 100.

Answer: Two at 40 °, one at 100 °.