Isosceles Triangle: Quick Intro

Slide the slider in the lower left corner. The triangle formed is said to be ISOSCELES. You can move the large points around if you'd like.

Slide the slider in the lower left corner. The triangle formed is also said to be ISOSCELES. You can move the large points around if you'd like.

Without Googling, what does it mean for a triangle to be isosceles? Describe.