(3) Oetermine o baricentro do triangula que tem o vérias \( (1,1),(3,1),(-1,3) \)

3. Construye angulos con las siguientes medidas, Luego, clasificalos según sus medidas. \( \begin{array}{lllll}\text { a. } 25^{\circ} & \text { b. } 85^{\circ} & \text { c. } 68^{\circ} & \text { d. } 150^{\circ} & \text { e. } 100^{\circ}\end{array} \)

Qual é a fórmula para calcular a área de um círculo?

Write the corresponding parts not given for the congruent triangles. \( \angle B=90^{\circ} \) and \( \angle \mathrm{T}=90^{\circ} \) \( \mathrm{CB}=\mathrm{UT} \) \( \mathrm{AB}=\mathrm{ST} \)

If the height of a cylinder is doubled while keeping the radius constant, how does that affect its volume?

3.) WHEA OF IS The ARE OF A SECTOR OF A CIRCLE RADIUS \( r=13 \mathrm{cM} \) IF the CORRESPONPING CENTRAL ANGLF IS \( 30^{\circ} \) ? 4.) WHAT IS TLE AREA OF A SEGTOR OF A CIRULE WHT DIAMETER \( D=28 \mathrm{cM} \) If the GENTRAL ANGLE IS \( 320^{\circ} \) ?