1103107012 | math4u.vsb.cz

SubArea:

Metric properties

Level:

Project ID:

1103107012

Accepted:

1

Clonable:

0

Easy:

0

Let

A B C D E F A^{'} B^{'} C^{'} D^{'} E^{'} F^{'}

be a regular hexagonal prism with the base edge length of

4 cm

and the height of

8 cm

. Find the angle between the plane

A D D^{'}

and the plane

C D D^{'}

(see the picture).

60^{\circ}

45^{\circ}

90^{\circ}

72^{\circ}