ATLC is and Isosceles triangle with a vertex angle L. If the measure of LL = 90°, find the measure of LT.
(1 point)
• 30°
• 45°
O 15°
• 90°
Since ATLC is an isosceles triangle, we know that AT = TC.
Since LL = 90°, we can use this information to find the measure of angle L.
In a triangle, the sum of the angles must add up to 180°.
So, the measure of angle L is 180° - 90° = 90°.
Since ATLC is an isosceles triangle, we know that angle A and angle C are congruent.
So, the measure of angle A and angle C is also equal to 90°/2 = 45°.
Therefore, the correct answer is • 45°