Answer

Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.

Updated On: 21-6-2020

Apne doubts clear karein ab Whatsapp par bhi. Try it now.

CLICK HERE

Loading DoubtNut Solution for you

Watch 1000+ concepts & tricky questions explained!

293.0 K+

14.6 K+

Text Solution

Solution :

To prove- `/_E=1/2/_A`<br>
By exterior angle theorem<br>
`/_A+/_B=/_ACD`<br>
`1/2/_A+1/2/_B=1/2/_ACD`<br>
`1/2/_A+/_1=/_2`<br>
`/_2=/_1+1/2/_A-(1)`<br>
`In /_\BCE`<br>
`/_ECD=/_1+/_E`<br>
`/_2=/_1+/_E-(2)`<br>
From equation 1 and 2<br>
`/_1+/_E=/_1+1/2/_A`<br>
`/_E=1/2/_A`.**What is triangle?**

**Sides and Angles of triangle**

**Types of triangle on the basis of Side**

**Types of triangle on the basis of angles**

**The sum of the three angles of a triangle is `180^@`**

**If two parallel lines intersected by a transversal; prove that the bisectors of the two pairs of interior angle encloses a rectangle.**

**The sum of two angles of a triangle is equal to its third angle. Determine the measure of third angle.**

**In a `Delta ABC`; if `2 /_A = 3 /_B = 6 /_C`; Determine `/_A;/_B and /_C`**

**A triangle ABC is right angled at A. AL is drawn perpendicular to BC. Prove that ` /_BAL = /_ACB`**

**In `Delta ABC;/_B = 45^@;/_C=55^@` and bisector of `/_A` meets BC at a point D. find `/_ADB and /_ADC`**