The size of two of the three angles in a triangle are 40 degrees and 70 degrees. What is the special name given to this triangle?

It is an isosceles triangle. We know this because 40 + 70 = 110. So we take away 110 from 180 (The sum of the three degrees in a triange) to give us the degree of the last angle, which is 70. Since we have two angles of the same degree, we must have an isosceles triangle because an isosceles triangle has two equal sides and two equal angles.

Answered by Natalie R. Maths tutor

13725 Views

See similar Maths 11 Plus tutors

Related Maths 11 Plus answers

All answers ▸

Find the slope of the line perpendicular to the line y = (1/5)x - 2


Two identical cuboids have dimensions of 4cm by 6cm by 12cm. What is their combined volume?


Chloe has 3 pieces of wool. One piece is 160mm long, another is 26cm long and the last piece is 0.45m long. What is the total length of wool, in centimetres, that Chloe has?


What is 2/5 + 3/4 ?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences