Given here are some figures.

Classify each of them on the basis of the following.
(a) Simple curve
(b) Simple closed curve
(c) Polygon
(d) Convex polygon
(e) Concave polygon

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(a)

Consider the following parallelograms. Find the values of the unknowns x, y and z.

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(a)

A rectangular MORE is shown below:

Answer the following questions by giving appropriate reason.
(i) Is RE = OM?
(ii) Is ㄥMYO = ㄥRXE?
(iii) Is ㄥMOY = ㄥREX?
(iv) Is ΔMYO ≅ RXE?
(v) Is MY = RX?

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(a)

In the following figure of a ship, ABDH and CEFG are two parallelograms. Find the value of x.

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(a)

PQRS is a rhombus such that perpendicular bisector of PQ passes through the point S. Find the angles of rhombus.

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(a)

RISE is a rectangle and its diagonals meet at O. If RO = (3x + 15) and 10 = (5x + 7), find the value of x.

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(a)

The angle between the two altitudes of a parallelogram through the vertex of an obtuse angle of the parallelogram is 45°. Find the measure of the obtuse angle.

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(a)

The diagonals of a rhombus are 8 cm and 15 cm. Find its side.

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(a)

A rangoli has been drawn on the floor of a school's main gate. Participatent of Class VllI th girls for making rangoli, all bring different types of color from market to colour the rangoli (as shown below), where, ABCD and PORS both are in the shape of a rhombus. Find the radius of semi circle drawn on each side of rhombus ABCD. What type of value depict here?

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(a)

Find the number of diagonals in a decagon.

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(a)