Math, asked by ry185136, 10 months ago

iska ans ye anna chaiye

(a) ∆ace=40°

(b) ∆dce=60°​

Attachments:

Answers

Answered by PixleyPanda
0

Answer:

Step-by-step explanation:Because set A is a common name for isosceles triangle and equilateral triangle and set c and b is a subset of A

__________________________

Step-by-step explanation:

Given: Three angles of a quadrilateral are 75°, 90° and 75°.

Let the fourth angle be x.

Using angle sum property of quadrilateral,

75°+90°+75°+x=360°⇒240°+x=360°

⇒x=360°-240°⇒x=120°

So, the measure of the fourth angle is 120°.

_____________________________

More clear explanation ❤

In ||gm ABCD,

Base AB = 16 cm

and altitude AE = 8 cm

RD Sharma Class 9 Solutions Chapter 14 Quadrilaterals

∴ Area = Base x Altitude

= AB x AE

= 16 x 8 = 128 cm2

Now area of ||gm ABCD = 128 cm2

Altitude CF = 10 cm

∴ Base AD = \frac { Area }{ Altitude } = \frac { 128 }{ 10 } = 12.8cm

Question 2.

In Q. No. 1, if AD = 6 cm, CF = 10 cm, AE = 8 cm, find AB.

Solution:

Area of ||gm ABCD,

RD Sharma Solutions Class 9 Chapter 14 Quadrilaterals

= Base x Altitude

= AD x CF

= 6 x 10 = 60 cm2

Again area of ||gm ABCD = 60 cm2

Altitude AE = 8 cm

∴ Base AB =\frac { Area }{ Altitude } = \frac { 60 }{ 8 } = \frac { 15 }{ 2 } cm = 60

Similar questions