mjwenz8018
05.05.2020 •
Mathematics
Triangle MNO is similar to triangle RPO. Triangle M N O. Side M N is 20 kilometers and side M O is 32 kilometers. Triangle R P O. Side O R is 48 kilometers. Valek finds the distance between P and R. His work is shown below. Step 1 StartFraction 32 Over 48 EndFraction = StartFraction 20 Over P R EndFraction Step 2 20 P R = (32) (48) Step 3 20 P R = 1,536 Step 4 P R = 76.8 kilometers What is Valek’s first error? Valek did not correctly divide 1,536 by 20 going from step 3 to step 4. Valek did not find the correct product of 32 and 48 going from step 2 to step 3. Valek should have written the proportion in step 1 as StartFraction 32 Over 20 EndFraction = StartFraction P R Over 48 EndFraction. Valek should have written the cross-product in step 2 as 32 P R = (20) (48).
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Ответ:
Angles ACB and CAB are both 75 degrees due to the fact that they are 90 degree angles subtracting the 15 degrees. Then add the two together and subtract from 180.