Hãy chọn câu đúng. Cho ΔABC, I, K lần lượt là trung điểm của AB và BC. Biết AC = 10cm.
Độ dài IK bằng:
Trắc nghiệm Đường trung bình của tam giác, của hình thang có đáp án
Group of answer choices

A. IK = 4cm.

B. IK = 5 cm.

C. IK = 3,5cm.

D. IK = 10cm.

no not all of them.

step-by-step explanation:

some of them have a square base.

b

step-by-step explanation:

49/6 is going to equal 8 1/6

alright so i think for this one it would to draw it out. this may be hard for me to try and draw, but i will do my best on here:

        r

  /       |     \

notice how it forms 2 triangles inside one bigger triangle.

so if we know the angle spr is the same as psr that is saying the measure of angle p is the same as angle s. this means the big triangle psr is either isosceles or equilateral. in both cases, the triangle is perfectly symmetrical when split down the middle, which is in this case rq. because we know it is perfectly symmetrical on both sides, we know that the two triangles inside the bigger one are equal.