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lisabon 2012 [21]
3 years ago
15

in angle HIJ the measure of angle J is equal to 90° HI is equal to 88 ft,and IJ=62ft . find the measure of angle I to the earest

tenths of a degree
Mathematics
1 answer:
Radda [10]3 years ago
7 0

Answer: 45.21^{\circ }

Step-by-step explanation:

Given

\angle J=90^{\circ }

HI=88 ft

IJ=62 ft

From the figure, we can write

\cos I=\frac{IJ}{HI}=\frac{62}{88}=\frac{31}{44}\\I=\cos^{-1} (\frac{31}{44})=45.207^{\circ }\approx 45.21^{\circ }

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