If a cyclic quadrilateral has angles measuring 70 degrees, 80 degrees, and 90 degrees, what is the measure of its fourth angle?

How long is an arc intercepted by the given central angle in a circle of radius 3.97 km ? \( 150^{\circ} \)

5. Draw the points in a coordinate system (unit 1 cm\( ) \). Connect them to form a square and calculate the area. To do this, measure the required lengths. \( \begin{array}{ll}\text { a) } A(1 \mid 2) ; B(2 \mid 0) ; C(4 \mid 2) ; D(2 \mid 4) & \text { b) } A(4,5 \mid 1) ; B(13 \mid 5) ; C(8 \mid 10,5) ; D(1 \mid 9,5) \\ \text { c) } A(2 \mid 5) ; B(5 \mid 2) ; C(12 \mid 5) ; D(5 \mid 8) & \text { d) } A(6 \mid 1,5) ; B(10,5 \mid 1) ; C(10 \mid 5,5) ; D(2 \mid 9,5)\end{array} \)

Day 1: Name the 2d shapes

Disegnare le rette di equazione: a. \( y=3 x-5 \) b. \( x+2 y-4=0 \) c. \( x=-3 \) d. \( y=1 \) Capire se le coppie di rette a.-b. e c.-d. sono parallele, perpendicolari incidenti.

(7) OPEN ENDED QUESTION Why is area a squared unit?