2. 职称英语
  3. In[img]2014m5x/ct_egreqj_egreqjs_0002_20132[/img]ABC, AB[img]2014m5x/ct_egreqj_e

In[img]2014m5x/ct_egreqj_egreqjs_0002_20132[/img]ABC, AB[img]2014m5x/ct_egreqj_e

游客2025-02-24  45
问题 InABC, ABAC and the measure of∠B is 34°. What is the measure of∠A?
选项 A、34°
B、56°
C、68°
D、73°
E、112°
答案 E
解析 The correct answer is E. A good way to solve this problem is to sketch triangle ABC, as shown below:

You are given that AB is congruent to AC, and that the measure of angle B is 34°. This means that the measure of angle C is also 34°, and the measure of angle A is 180° - 34° - 34° = 112°.
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