1 year ago

Please help will mark Brainliest!!

Mathematics

1 answer:

seraphim [82]1 year ago

3 0

$~~~~~~x+80^{\circ} = 180^{\circ}\\\\\implies x = 180^{\circ} - 80^{\circ}\\\\\implies x = 100^{\circ}$

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Answer:

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Step-by-step explanation:

<u>Explanation</u>:-

Given A regular triangular pyramid has a base of area is 31.5mm^2

and also given surface area of triangular pyramid is 252 mm ^2

by using formula

surface area of regular triangular pyramid = base of area + half of lateral surface.

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$252-31.5= \frac{1}{2} lateral surface$

220.5 = lateral area of triangular pyramid

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3 years ago

Please help will mark Brainliest!!​

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