If the area of triangle A with sides 5, 12, and 13 equals the area of rectangle B with height 5, what is the perimeter of the rectangle ?

Step-by-step explanation:

Since the sides are in the ratio 5:12:13 and the perimeter is 90 cm, we can determine the length of the sides as follows:

5x + 12x + 13x = 90 cm

30x = 90 cm

x = 3 cm

So the sides of the triangle are 15 cm, 36 cm, and 39 cm.  The 39 cm side is the hypotenuse, so the area is:

Area = (1/2)*Base*Height = (1/2)*(15)*(36) = 270 cm2

i dont know i just need points

you estimate that the angle of elevation to the top of the 86th floor (the observatory) is 82 .the total height of the building is another 123 meters above the 86th floor.

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