What is the area of this triangle. Only round your final answer to the nearest hundredth.

What is the area of this panel? Round your final answer to the nearest tenth.

A triangular pennet has two sides that are 90 cm long each with an included angle of 25dg. What is the area of this pennant? Round only your final answer to the nearest tenth.

What is the area of Triangle RST? Round only your final answer to the nearest tenth.

Guest Apr 12, 2017

#2**+1 **

All of these are exactly the same....

Area = (1/2)(product of two given sides) (sine of the included angle)

Area of 1st one = (1/2)(7.5)(13)sin(94) ≈ 48.63 in^2

You should be able to do the rest......pay attention to the units given......!!!!!

CPhill
Apr 12, 2017

#3**+1 **

**Four tasks**

\(\large A=\frac{1}{2}\ ab\ sin\gamma\)

(a)

What is the area of this triangle. Only round your final answer to the nearest hundredth.

\(\large A=\frac{1}{2}\cdot 13\cdot7.5\ inch^2\ sin \ 94°=48.63\ inch^2\)

(b)

What is the area of this panel? Round your final answer to the nearest tenth.

\(\large A=\frac{1}{2}\cdot 12\cdot14\ ft^2\ sin \ 20°=28.7\ ft^2\)

(c)

A triangular pennet has two sides that are 90 cm long each with an included angle of 25dg. What is the area of this pennant? Round only your final answer to the nearest tenth.

\(\large A=\frac{1}{2}\cdot 90\cdot90\ cm^2\ sin \ 25°=1711.6cm^2\)

(d)

What is the area of Triangle RST? Round only your final answer to the nearest tenth.

\(\large A=\frac{1}{2}\cdot 8\cdot9\ yd^2\ sin \ 47°=26.3\ yd^2\)

!

asinus
Apr 12, 2017