Question

Please answer the above question. ........Some questions are asking about the formulae.....please answer.....​

Answer 1

Answer:

ar of square is a^2 and parallogram is 1/2(daigonal pruduct)

Answer 2

2. Area of rectangle= Length×Breadth

3. Area of rhombus= (Diagonal 1 × Diagonal 2) / 2

4. Area of square= Side × Side

5. Heron's Formula= Area= √{s(s-a)(s-b)(s-c)}

6. Properties of a cyclic quadrilateral are:

(i) In a cyclic quadrilateral, all the four vertices of the quadrilateral lie on the circumference of the circle.

(ii) The four sides of the inscribed quadrilateral are the four chords of the circle.

(iii) The measure of an exterior angle at a vertex is equal to the opposite interior angle.

(iv) In a cyclic quadrilateral, p × q = sum of product of opposite sides, where p and q are the diagonals.

(v) The perpendicular bisectors are always concurrent.

(vi) The perpendicular bisectors of the four sides of the cyclic quadrilateral meet at the center O.

(vii) The sum of a pair of opposite angles is 180° (supplementary). Let ∠A, ∠B, ∠C, and ∠D be the four angles of an inscribed quadrilateral. Then, ∠A+∠C=180° and ∠B+∠D=180°.

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