मराठी

Write the Sum of the Angles of an Obtuse Triangle.

Advertisements
Advertisements

प्रश्न

Write the sum of the angles of an obtuse triangle.

थोडक्यात उत्तर
Advertisements

उत्तर

In the given problem, ΔABC is an obtuse triangle, with ∠B as the obtuse angle.

So, according to “the angle sum property of the triangle”, for any kind of triangle, the sum of its angles is 180°. So,

∠A+ ∠B + ∠C = 180°

Therefore, sum of the angles of an obtuse triangle is 180°.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 11: Triangle and its Angles - Exercise 11.3 [पृष्ठ २३]

APPEARS IN

आर.डी. शर्मा Mathematics [English] Class 9
पाठ 11 Triangle and its Angles
Exercise 11.3 | Q 2 | पृष्ठ २३

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

Determine the measure of each of the equal angles of a right-angled isosceles triangle.


AB is a line seg P and Q are points on opposite sides of AB such that each of them is equidistant from the points A and B (See Fig. 10.26). Show that the line PQ is perpendicular bisector of AB. 

 


The vertical angle of an isosceles triangle is 100°. Find its base angles. 


BD and CE are bisectors of ∠B and ∠C of an isosceles ΔABC with AB = AC. Prove that BD = CE. 


PQR is a triangle in which PQ = PR and S is any point on the side PQ. Through S, a line is drawn parallel to QR and intersecting PR at T. Prove that PS = PT.  

 


Prove that each angle of an equilateral triangle is 60°. 


In a ΔPQR, if PQ = QR and L, M and N are the mid-points of the sides PQ, QR and RP
respectively. Prove that LN = MN. 

 


Which of the following statements are true (T) and which are false (F):  

If the bisector of the vertical angle of a triangle bisects the base, then the triangle may be isosceles. 


Fill the blank in the following so that the following statement is true. 

Sides opposite to equal angles of a triangle are ...... 


Prove that the perimeter of a triangle is greater than the sum of its altitudes. 


Fill in the blank to make the following statement true. 

If two angles of a triangle are unequal, then the smaller angle has the........ side opposite to it. 


Fill in the blank to make the following statement true.  

If two sides of a triangle are unequal, then the larger side has .... angle opposite to it. 


If the angles of a triangle are in the ratio 2 : 1 : 3, then find the measure of smallest angle.


In a ΔABC, if ∠A = 60°, ∠B = 80° and the bisectors of ∠B and ∠C meet at O, then ∠BOC =


In the given figure, what is the value of x?


The angles of a right angled triangle are


In ∆ABC, BC = AB and ∠B = 80°. Then ∠A is equal to ______.


In ∆PQR, ∠R = ∠P and QR = 4 cm and PR = 5 cm. Then the length of PQ is ______.


In triangles ABC and PQR, AB = AC, ∠C = ∠P and ∠B = ∠Q. The two triangles are ______.


M is a point on side BC of a triangle ABC such that AM is the bisector of ∠BAC. Is it true to say that perimeter of the triangle is greater than 2 AM? Give reason for your answer.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×