1103030601 | math4u.vsb.cz

SubArea:

Points and vectors

Level:

Project ID:

1103030601

Accepted:

1

Clonable:

0

Easy:

0

In the cube

A B C D E F G H

find the angle

φ

between the vectors

\vec{b} = \vec{E B}

and

\vec{a} = \vec{A K}

, where

K

is the midpoint of

H G

. Round

φ

to the nearest degree. Help: Choose the appropriate coordinate system.

φ ≐ 104^{\circ}

φ ≐ 76^{\circ}

φ ≐ 100^{\circ}

φ ≐ 80^{\circ}