A flat piece of cardboard is placed on a mirror as shown below. What is the area of the figure formed by combining (0) 0 the

Question

A flat piece of cardboard is placed on a mirror as shown below. What is the area of the figure formed by combining
(0) 0
the triangle and its image?
5
7
01
3
(a) 3(2+ 10)
(b) 6(2+V10)
(c) 4(2+v10)
(d) None of these

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Melody 3 weeks 2021-11-07T09:30:40+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-11-07T09:32:04+00:00

    Answer:

    none of these

    Step-by-step explanation:

    As per the laws of reflection we have angle of incidence equal to angle of reflection. Figure A and B are the ones with the bulb on the path of incidence and eye in the path of reflection.

    0
    2021-11-07T09:32:30+00:00

    Answer:

    (b) 6(2+√10) is the answer

    Step-by-step explanation:

    first of all calculate the base of the triangle by Pythagoras theorem

    (3)² + x² = (5)²

    x = 4

    and (3)² + y² = (7)²

    y = 2√10

    so the base is 4+2√10

    now formula of area of triangle is 1/2(base x altitude)

    1/2[3 x (4+2√10)]

    = 3(2+√10) will be the area of triangle and same will be the area of image

    so final answer is 6(2+√10)

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