Find the total surface area of this triangular prism

Mathematics

1 answer:

____ [38]3 years ago

3 0

Answer:

Total surface area is 630cm

Step-by-step explanation:

Surface area = (Perimeter of the base × Length) + (2 × Base Area) = (S1 +S2 + S3)L + bh

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Read 2 more answers

What is the answer to this question?

shepuryov [24]

Answer:

6.4

Step-by-step explanation:

The given triangle is a Right Angled Triangle with right angle at E.

So, measure of angle E = 90 degrees

measure of angle D = 62 degrees

measure of side FE = 12

We have to find the measure of side DE. Note that side DE is adjacent to Angle D and side FE is opposite to angle D. So we can use tangent ratio to find the measure of DE.

$\textrm{Tangent of angle}=\frac{Opposite}{Adjacent}\\\\tangent(62)=\frac{FE}{DE}\\\\tangent(62)=\frac{12}{DE}\\\\DE=\frac{12}{tangent(62)}\\\\DE=6.4$