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If the degree measures of two angles of ∆ABC are 50° and 65°, what is

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Joined: 02 Sep 2009
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If the degree measures of two angles of ∆ABC are 50° and 65°, what is  [#permalink]

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25 Feb 2019, 01:59
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If the degree measures of two angles of ∆ABC are 50° and 65°, what is the degree measure of the third angle?

A. 15°
B. 50°
C. 65°
D. 115°
E. 165°

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Joined: 15 Feb 2018
Posts: 365
Re: If the degree measures of two angles of ∆ABC are 50° and 65°, what is  [#permalink]

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25 Feb 2019, 05:35
Triangle has 3 angles. They sum to 180º
We are given two of those angles. We subtract those numbers from 180º to arrive at size of the third angle

180-65-50=65
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Re: If the degree measures of two angles of ∆ABC are 50° and 65°, what is  [#permalink]

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25 Feb 2019, 05:47
ImMO 65

180 - (50+65) = 65

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Re: If the degree measures of two angles of ∆ABC are 50° and 65°, what is  [#permalink]

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02 Mar 2019, 09:16
Bunuel wrote:
If the degree measures of two angles of ∆ABC are 50° and 65°, what is the degree measure of the third angle?

A. 15°
B. 50°
C. 65°
D. 115°
E. 165°

The 3rd angle is 180 - 50 - 65 = 65°.

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Joined: 25 Feb 2019
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Re: If the degree measures of two angles of ∆ABC are 50° and 65°, what is  [#permalink]

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02 Mar 2019, 09:22
sum of all 3 angles = 180

so third angle = 180-(50+65)

= 65

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Re: If the degree measures of two angles of ∆ABC are 50° and 65°, what is   [#permalink] 02 Mar 2019, 09:22
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