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sertanlavr [38]
3 years ago
5

Pleaseeeeee help i will mark brainlest

Mathematics
2 answers:
NNADVOKAT [17]3 years ago
3 0

Answer:

e°=100°

Step-by-step explanation:

Sum of angles in a triangle= 180°

70°+30°+x°=180°

100°+x=180

Collect like terms

x°=180-100

x°=80°

e° is an exterior angle

exterior angle =180- interior angle

180°- x°

180°- 80°

=100°

e°=100°

sattari [20]3 years ago
3 0

Answer:

(d)100

explanation:

Because the outer angle equals to the measure of the inner angles

hope it helps :)

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Area\,\,of\,\,triangle =\sqrt{s(s-a)(s-b)s-c)} \\where\,\, s = \frac{a+b+c}{2}

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So, area of triangle is 9.88 units^2

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