Pythagorean theorem of mathematics in the second day of junior high school is urgent ! ! ! !

1. Root sign (2 2+3 2) = root sign 14.

Or root number (3 2-2 2) = root number 5.

2. Capital letters can only represent angles, and C-A=5 doesn't understand what it means.

3. Cardinality = 12*2/3=8, perimeter =8+ radical sign (3 2+4 2)+radical sign (3 2+4 2) =18.

4. The height of the bottom = root sign (13 2-5 2) = 12.

5 .. The root number (58 2+46) = 74.02 ..., about 74 cm, 29 inches.

6. 1 1 60 6 1 is a Pythagorean array, so the perimeter = 132.