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A right pyramid V-EFGH is mounted onto a cuboid ABCDEFGH. Given AB = BC = 15√2 cm, CG = 8 cm, and VG = 17√2 cm. Calculate: a) The length of AC. b) The angle between the line AG and the plane ABCD.

Mathematics

ScanSolve AI Answer

Answer

a

30 cm\text{30 cm}

Step-by-step solution

3 steps

Here's the solution to question 11:

The figure shows a right pyramid V-EFGH mounted onto a cuboid ABCDEFGH.
Given dimensions:
AB=BC=152AB = BC = 15\sqrt{2} cm (This means the base ABCD is a square)
CG=8CG = 8 cm (Height of the cuboid)
VG=172VG = 17\sqrt{2} cm (Slant edge of the pyramid)

Part a· 2 steps

Calculate the length of AC.

  1. Identify the shape of the base ABCD.

    The base ABCD is a square with side length AB=BC=152AB = BC = 15\sqrt{2} cm.

  2. Use the Pythagorean theorem in the right-angled triangle ABC.

    AC2=AB2+BC2AC^2 = AB^2 + BC^2 AC2=(152)2+(152)2AC^2 = (15\sqrt{2})^2 + (15\sqrt{2})^2 AC2=(225×2)+(225×2)AC^2 = (225 \times 2) + (225 \times 2) AC2=450+450AC^2 = 450 + 450 AC2=900AC^2 = 900 AC=900AC = \sqrt{900} AC=30 cmAC = 30 \text{ cm}

    The length of AC is 30 cm\boxed{\text{30 cm}}.

Part b· 1 step

The angle between the line AG and the plane ABCD.

  1. Identify the projection of line AG on the plane ABCD.

    The projection of point A on plane ABCD is A.
    The projection of point G on plane ABCD is C (since CG is perpendicular to ABCD).
    Thus, the projection of line AG on plane ABCD is the line segment AC

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