Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

<div>Construct an equilateral triangle whose altitude is 4.5cm.</div>
Asked by araima2001 | 06 Mar, 2015, 03:08: PM
Expert Answer

Draw a line PQ.

Take any point L on this line.

Construct perpendicular AL on PQ.

Cut a line segment AD from D equal to 4.5 cm.

Make angles equal to 30° at A on both sides of AD, say ∠CAD and ∠BAD where B and C lie on XY.

Then, ABC is the required triangle.

Justification:

Since ∠A = 30° + 30° = 60° and AL ⊥ BC,

Therefore, ∆ABC is an equilateral triangle with altitude AL = 4.5 cm.


Answered by Mili Hariyani | 07 Mar, 2015, 01:38: PM
Multiple Choice Questions Practice Test Subjective Questions Webinar Subjective Questions Pre Board Assessment

Concept Videos

Application Videos

Answered Unanswered My Questions My Answers
CBSE 9 - Maths
Construct a triangle ABC where BC=5cm,angle B=30°and AC-BC=2cm.
Asked by swatipuspapatel | 11 Feb, 2021, 07:39: PM
ANSWERED BY EXPERT
CBSE 9 - Maths
construct the angles of following 30 degree, 22 half degree and 15 degree
Asked by bhawindersaini | 10 Aug, 2020, 06:58: PM
ANSWERED BY EXPERT
CBSE 9 - Maths
Prove that through a given point, we can draw only one perpendicular to a given line
Asked by dkmaradona8051 | 05 Aug, 2020, 09:44: AM
ANSWERED BY EXPERT
CBSE 9 - Maths
Construct triangleABC in which AB=5cm,AC–BC=2.5 angle AngleA=30°
Asked by snrsunny1177 | 20 Jan, 2020, 06:35: PM
ANSWERED BY EXPERT
CBSE 9 - Maths
How the construction is done     
Asked by Aniskhatib999 | 04 Jan, 2020, 05:59: PM
ANSWERED BY EXPERT
CBSE 9 - Maths
sir you did not teach how to construct triangles with given base,base angle and perimeter
Asked by vneenahb | 13 Nov, 2019, 02:51: PM
ANSWERED BY EXPERT
CBSE 9 - Maths
construct a ∆ABC whose perimeter is 10.4cm base angle are 45 and 120
Asked by pk6686742 | 06 Nov, 2019, 08:34: PM
ANSWERED BY EXPERT
CBSE 9 - Maths
The perimeter of the triangle is 14.4 cm and the ratio of the length of its side is 2 is to 3 is to 4 construct a triangle
Asked by gawaliabhas2019 | 27 Sep, 2019, 10:18: PM
ANSWERED BY EXPERT
CBSE 9 - Maths
When we are given base angle base length and difference of two sides in a triangle ,how will we know that when we have to make it simple aur extend it firm other side ...
Asked by syednargis55 | 26 Jun, 2019, 11:53: PM
ANSWERED BY EXPERT
CBSE 9 - Maths
Drow an angle of 60' and bisect it  
Asked by anuragsharma03jp | 16 Mar, 2019, 12:05: AM
ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt

Start your hassle free Education Franchisee and grow your business!

Know more
×