Cho tam giác ABC, các đường cao AK và BD cắt nhau tại G. Vẽ đường trung trực HE, HF của AC và BC. Chứng minh rằng : BG = 2HE và AG = 2HF.

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step-by-step explanation:

"image"

step-by-step explanation:

in most of these problems, the notation is that the point with a "prime" is the image of the point without. that is, b' is the image of b.

here, there is no dilation or reflection. there is simply translation (with no direction shown). which figure you call the "preimage" and which one you call the "image" is up to you. as a matter of convention, the naming is as described above.

a triangular prism is a 3 dimensional shape composed of triangles and rectangles. it is made from two triangular bases and three rectangular sides.