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△RST is isosceles and ∠RST= 40°Column A
△RST is isosceles and ∠RST= 40°Column A
游客
2024-01-12
53
管理
问题
△RST is isosceles and ∠RST= 40°
Column A Column B
The sum of the measures of the two angles of 120°
△RST that have equal measure
选项
A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案
D
解析
△RST是等腰三角形,且∠RST=40o
解:本题的正确答案为(D)。比较的左项为△RST中两个底角的和,该题需分两种情况进行讨论:①∠RST是顶角,则两个底角的和为:180o-40o=140o ②∠RST是底角,则两个底角的和为:2×40o=80o
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