Advertisements
Advertisements
प्रश्न
If each of the two equal angles of an isosceles triangle is 68°, find the third angle.
उत्तर
Let Δ ABC is an isosceles triangle
∴ In Δ ABC, AB = AC
and ∠B = ∠C = 68°
But ∠A + ∠B + ∠C = 108° ...(Sum of angles of a triangle)
⇒ ∠A + 68° + 68° = 180°
⇒ ∠A + 136° = 180°
⇒ ∠A = 180° - 136°
∴ ∠A = 44°
Hence third angle = 44°
APPEARS IN
संबंधित प्रश्न
Construct traingle ABC, when : AB = 3.5 cm, AC = 4.8 cm and BC = 5.2 cm.
One of the angles of a triangle is 110°, the two other angles are equal. Find their value.
In the following figure, triangle ABC is equilateral and triangle PBC is isosceles. If PBA = 20°; find angle BPC.
Using ruler and a pair compass only, construct a triangle PQR, given PQ = 5.5 cm, QR = 7.5 cm and RP = 6 cm. Draw the bisectors of the interior angles at P, Q and R. Do these bisectors meet at the same point ?
Observe the figure below and write the type of the triangle based on its angles.
Δ LMN is ... triangle
Name the type of following triangle :
∆PQR such that PQ = QR = PR = 5 cm.
Name the type of following triangle :
ΔXYZ with m∠Y = 90° and XY = YZ.
Name the following triangle in two different ways: (you may judge the nature of the angle by observation)
Name the following triangle in two different ways: (you may judge the nature of the angle by observation)
Name polygon.
Make two more examples of this.
