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In each of the following, state if the s...

In each of the following, state if the statement is true (T) or false (F): (i) A triangle has three sides. (ii) A triangle may have four vertices. (iii) Any three line-segments make up a triangle. (iv) The interior of a triangle includes its vertices. (v) The triangular region includes the vertices of the corresponding triangle. (vi) The vertices of a triangle are three collinear points. (vii) An equilateral triangle is isosceles also. (viii) Every right triangle is scalene. (ix) Each acute triangle is equilateral. (x) No isosceles triangle is obtuse.

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In each of the following, state if the statement is true (T) or false (F). A triangle has three sides A triangle may have four vertices. Any three line-segment make up a triangle The interior of a triangle includes its vertices. The triangular region includes the vertices of the corresponding triangle. The vertices of a triangle are three collinear points. An equilateral triangle is scalene. Every right triangle is scalene. Each acute triangle is equilateral. No isosceles triangle is obtuse.

State which of the following statement are true and which are false: (i) A scalene triangle has three lines of symmetry.

State which of the following statements are true and which are false: A regular triangle has three lines of symmetry .

State the number of lines of symmetry for the following figures: (i) An equilateral triangle (ii) An isosceles triangle

State which of the following statements are true and which are false : Every equilateral triangle is an isosceles triangle .

If the altitudes from two vertices of a triangle to the opposite sides are equal, prove that the triangle is isosceles.

If the altitudes from two vertices of a triangle to the opposite sides are equal, prove that the triangle is isosceles.

If the vertices of a triangle have rational coordinates, then prove that the triangle cannot be equilateral.

If the vertices of a triangle have rational coordinates, then prove that the triangle cannot be equilateral.

If the vertices of a triangle have rational coordinates, then prove that the triangle cannot be equilateral.

RD SHARMA ENGLISH-TRIANGLES-All Questions
  1. Take three collinear point A ,\ B and C\ on a page of your note ...

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  2. Distinguish between a triangle and its triangle region.

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  3. In fig.9, D is a point on side B C of a \ A B Cdot\ \ A D is joined. N...

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  4. In fig. 10, A , B , C and D are four points, and no three points ar...

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  5. What is the difference between a triangle and triangular region?

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  6. Explain the following terms: (i) Triangle                       (ii)...

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  7. In fig. 11, the length (in cm) of each side has been indicated alon...

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  8. In fig. 12, there are five triangles. The measures of some of their...

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  9. Fill in the blanks with correct word/symbol to make it a true statemen...

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  10. In each of the following, state if the statement is true (T) or false ...

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  11. Total number of parts of a triangle is (a) 3      (b) 6       (c) 9 ...

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  12. A perpendicular drawn from a vertex to the opposite side of a triangle...

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  13. A triangle may not have(a) an altitude    (b) can have at most 3 a...

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  14. Line segments joining the vertices to the mid-points of the opposite ...

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  15. A triangle whose two sides are equal is called (a) an acute triangle...

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  16. A triangle whose two sides are equal is known as

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  17. A triangle whose all sides are equal is called

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  18. The sum of the lengths of sides of a triangle is known as its (a) are...

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  19. A triangle having all sides of different length is known as

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  20. A triangle whose one angle is more than 90^@ is called

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