Practice Question and Answer

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Answer : 3. "$$25{2\over 3}$$"

Q:

The sides of a triangle are in the ratio 2 : 3 : 4. The perimeter of the triangle is 18 cm. The area (in cm2) of the triangle is

895 0

  • 1
    9
    Correct
    Wrong
  • 2
    36
    Correct
    Wrong
  • 3
    $$ \sqrt {42}$$
    Correct
    Wrong
  • 4
    $$ 3\sqrt {15} sq.cm $$
    Correct
    Wrong
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Answer : 4. " $$ 3\sqrt {15} sq.cm $$"

Q:

Each side of an equilateral triangle is 6 cm. Find its area.

842 0

  • 1
    9 √3 sq.cm.
    Correct
    Wrong
  • 2
    6 √3 sq.cm.
    Correct
    Wrong
  • 3
    4√3sq.cm.
    Correct
    Wrong
  • 4
    8 √3 sq.cm
    Correct
    Wrong
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Answer : 1. "9 √3 sq.cm. "

Q:

If the numerical value of thes perimeter of an equilateral triangle is  $$ \sqrt {3}$$ times the area of it, then the length of each side of the triangle is

716 0

  • 1
    2 units
    Correct
    Wrong
  • 2
    3 units
    Correct
    Wrong
  • 3
    4 units
    Correct
    Wrong
  • 4
    6 units
    Correct
    Wrong
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Answer : 3. "4 units "

Q:

The area of a right-angled isosceles triangle having hypotenuse 16√2 cm is

735 0

  • 1

    144 cm2

    Correct
    Wrong
  • 2

    128 cm2

    Correct
    Wrong
  • 3

    112 cm2

    Correct
    Wrong
  • 4

    110 cm2

    Correct
    Wrong
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Answer : 2. "

128 cm2

"

Q:

The area of two equilateral triangles are in the ratio 25 : 36. Their altitudes will be in the ratio : 

632 0

  • 1
    36 : 25
    Correct
    Wrong
  • 2
    25 : 36
    Correct
    Wrong
  • 3
    5 : 6
    Correct
    Wrong
  • 4
    √5 : √6
    Correct
    Wrong
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Answer : 3. "5 : 6"

Q:

From a point in the interior of an equilateral triangle, the length of the perpendiculars to the three sides are 6 cm, 8 cm and 10 cm respectively. The area of the triangle is

793 0

  • 1

    48 cm2

    Correct
    Wrong
  • 2

    16√3 cm2

    Correct
    Wrong
  • 3

    192√3 cm2

    Correct
    Wrong
  • 4

    192 cm2

    Correct
    Wrong
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Answer : 3. "

192√3 cm2

"

Q:

In an isosceles triangle, the measure of each of equal sides is 10 cm and the angle between them is 45°. the area of the triangle is

581 0

  • 1
    $$25 \ cm^2 $$
    Correct
    Wrong
  • 2
    $$ {25\over 2}\sqrt { 2}cm^2 $$
    Correct
    Wrong
  • 3
    $$25 \sqrt { 2} \ cm^2$$
    Correct
    Wrong
  • 4
    $$25 \sqrt { 3} cm^2$$
    Correct
    Wrong
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Answer : 2. "$$ {25\over 2}\sqrt { 2}cm^2 $$"

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