1103101208 | math4u.vsb.cz

SubArea:

Metric properties

Level:

Project ID:

1103101208

Accepted:

1

Clonable:

0

Easy:

0

Let

A B C D

be a regular tetrahedron with an edge length of

5 cm

. Let

φ

be the angle between the face

A B D

and the base plane

A B C

(see the picture). Choose the correct expression for

φ

:

\cos φ = \frac{1}{3}

tg φ = 6 \sqrt{3}

tg φ = 3 \sqrt{2}

\cos φ = \frac{2}{3}