10. A rectangle with area of 3cm2 has lengths
(x + 4)cm and (x + 2)cm. Find its dimensions.

Step-by-step explanation:

We have (x + 4)(x + 2)cm² = 3cm².

=> x² + 6x + 8 = 3

=> x² + 6x + 5 = 0

=> (x + 5)(x + 1) = 0

=> x = -5 or x = -1

x = -5 is rejected as both side lengths would have negative values.

Therefore x = -1;

Hence the dimensions are 3cm by 1cm.

2.83941151 would be the answer you're looking for! : )

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.