Question

Anna purchased a phone with a rectangular screen that measures 6,5 centimeters in width and 12 centimeters in length. She wants to know the diagonal measure of

the screen. Round your answer to the nearest tenth of a centimeter
6.5 cm
12 cm

Answer 1

78? pls correct me if I'm wrong

Explanation:

Length times Width equals Area.

6.5×12=78

Answer 2

anywhere within 13.5 < cm < 14.5 ie) 13.7cm

Explanation:

Pythagoras for all diagonals or right angle sides.

12^2 + 6.5^2 = c^2

sqrt 144 + sq rt 42.25 = c^2

c^2 = sq rt 186.25 = 13.6473441 = 13.7cm

nearest 10th of a cm = 13.5<cm<14.5