Answer:Hello! I have done some research and foung that Jean-Charles de Borda is one of the 72 people who had their names enscribed on the Effiel Tower. He was a mathematician, physicist, and sailor. Hope this helps!!
Step-by-step explanation:
Answer:
68 degrees
Step-by-step explanation:
Since the angle is a right angle, it is 90 degrees, to figure out the measurement of a section if it, simply subtract the known angle 22, from 90 to get an answer of 68.
Answer:
B
Step-by-step explanation:
Two 90 degree angles add up to 180, a supplementary angle
Answer:
The width of bookcase D is 61 cm
The width of bookcase E is 61 cm
Step-by-step explanation:
see the attached figure to better understand the problem
step 1
Sum the widths of the three bookcases A, B and C
step 2
Subtract the sum of the three bookcases A,B and C from the total length of the wall
step 3
Divide that answer in step 2 by 2, and that will let you know the widths of D and E, because they may have equal widths
therefore
The width of bookcase D is 61 cm
The width of bookcase E is 61 cm