If Sally earned $630 in interest when investing $1200 at a rate of 15% per year, how many years have passed?
1 answer:
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Answer:
exterior angles:
144°and 36°
126° and 54°
90° and 90°
Step-by-step explanation:
we know that each angle in a triangle adds up to 180°.
so,
2x+3x+5x=180
10x=180
x=180/10
x=18
the interior angles are:
2x=36°
3x=54°
5x=90°
and explanation is provided to find the exterior angles above.(sorry for the bad handwriting)
Actually, the area of a triangle is a = bh/2. If a = 30 and b = 12:
So he height is 5 units
So he height is 5 units