Một hộp gồm 7 thẻ xanh đánh số từ 1-7 và 3 thẻ vàng đánh số từ 1-3. Chọn ngẫu nhiên 1 thẻ từ hộp. Tính xác suất được thẻ đánh số chẵn, biết rằng đã được thẻ xanh

the circle one

ur mom

step-by-step explanation:

proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc

nope.   happens to me as well.

-aparri