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# In the right triangle above, x – 10 =

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Math Expert
Joined: 02 Sep 2009
Posts: 55264
In the right triangle above, x – 10 =  [#permalink]

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08 Aug 2017, 10:21
00:00

Difficulty:

(N/A)

Question Stats:

100% (00:18) correct 0% (00:00) wrong based on 12 sessions

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In the right triangle above, x – 10 =

(A) 60
(B) 70
(C) 80
(D) 90
(E) 100

Attachment:

2017-08-08_2112.png [ 9.99 KiB | Viewed 471 times ]

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Re: In the right triangle above, x – 10 =  [#permalink]

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08 Aug 2017, 10:46
Bunuel wrote:

In the right triangle above, x – 10 =

(A) 60
(B) 70
(C) 80
(D) 90
(E) 100

Attachment:
2017-08-08_2112.png

Sum of angles of triangle $$= 180^{\circ}$$

$$x^{\circ} + 10^{\circ} + 90^{\circ} = 180^{\circ}$$

$$x + 100 = 180$$

$$x = 180 - 100 => 80$$

Therefore $$x^{\circ} = 80^{\circ}$$

$$x - 10 = 80 - 10 => 70$$

Re: In the right triangle above, x – 10 =   [#permalink] 08 Aug 2017, 10:46
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# In the right triangle above, x – 10 =

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