As the base angle is 50 degree then the second angle will also be 50 degree. This is because Isocelles triangle have two angles equal.
Now we know sum of all the angles of a triangle is 180. So the value of third angle will be 180-(50+50)=80 degree.
I hope my answer helps. Have a great day!
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1 Expert Answer
Hi Leah, In an isosceles triangle, 2 of the angles are identical sum of the 3 angles of a triangle is always 180 possibility 1 - 50 is one of the 2 identical angles the 3 angles will be 50, 50, (180-50-50) possibility 2 - 50 is not one of the 2 identical angles the 3 angles will be 50, (180-50)/2, (180-50)/2 you can work out the above and see which answer is not the possible angle Please let me know if you have further questions.