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andrey2020 [161]
3 years ago
10

PLEASE HELP WITH THIS MATH PROBLEM 30 POINTS

Mathematics
2 answers:
scZoUnD [109]3 years ago
7 0

Use formula A²+B²=C²
120²+62²=C²
14,400+3,844=C²
14,400+3,844=18,244
√18,244=135.07035...

135.07035...≈135.1
Salsk061 [2.6K]3 years ago
4 0

Answer:

The measure of one of the braces is 135.1 cm.

Step-by-step explanation:

It is given that A carpenter builds a rectangular bookcase that is 120 cm long and 62 cm tall. The carpenter uses two braces along the diagonals to support the bookcase.

From the figure drawn, let two braces be AC and BD. then, the value of one of the braces is:

Since, the measure of ∠C=90°, Using Pythagoras theorem in ΔBDC, we have

(BD)^2=(BC)^2+(DC)^2

Substituting the given values, we have

(BD)^2=(62)^2+(120)^2

(BD)^2=3844+14400

(BD)^2=18244

BD=135.1 cm

Therefore, the measure of one of the braces is 135.1 cm.

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