David is checking to make sure that a door frame he built has right angles. 7TH GRADE MATH HELP?
2015-04-13 10:11 pm
He measures the width of the floor to be 35 inches and the height to be 84 inches. To have right angles, what should be the length of the diagonal?
回答 (4)
2015-04-13 11:24 pm
To have right angle means that the Pythagorean theorem is satisfied, so a^2 + b^2 = c^2.
In your case, that would translate to 35^2+84^2=n^2.
And I'll leave the algebra to you.
In your case, that would translate to 35^2+84^2=n^2.
And I'll leave the algebra to you.
2015-04-13 10:49 pm
35^2 + 84^2 = d^2
d = 91
This is a standard 5, 12, 13 right triangle with each dimension multiplied by 7.
d = 91
This is a standard 5, 12, 13 right triangle with each dimension multiplied by 7.
2015-04-13 10:25 pm
x² = 35² + 84²
x² = 8281
x = 91 ins
x² = 8281
x = 91 ins
2015-04-13 10:15 pm
d=(35^2+84^2)^(1/2)
d=91in
d=91in
收錄日期: 2021-04-21 01:39:47
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