1 year ago

Please help I’m being timed

Mathematics

1 answer:

jok3333 [9.3K]1 year ago

6 0

First one. PNO =22 MNO =40

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Prove sum of interior angle triangle is 180

ryzh [129]

Given :- 

A triangle ABC .

To prove :- 

Sum of interior angles of a ∆ is 180° .

Construction :-

Draw a line MCN parallel to AB .
Extend line AB to K .

Proof :- 

In ∆ ABC , we have ,

$\angle$ BAC + $\angle$ BCA = $\angle$ CBK

As sum of two interior angles of a triangle is equal to the opposite exterior angle .

Also ,

$\angle$ ABC + $\angle$ CBK = 180°

( linear pair )

Hence from above two ,

$\angle$ ABC + $\angle$ BAC + $\angle$ ACB = 180°

Hence Proved ! 

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2 years ago

3.5−2.46=1.16

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Answer:

3.5

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3 years ago

*EXTRA PTS* find the value

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Answer:
13) 4
14) 7
15) 8
How?
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Hope this helps :D

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